Remove package lock

[shilman]

Issue: N/A

What I did

Travis builds like this one (#1337) are failing mysteriously all of a sudden. The only recent change that could be related (AFAIK) is my addition of npm5's package-lock.json to the repo.

This change removes all package-lock.json files, and also adds them to gitignore for now.

How to test

• build passes for this PR
• I will merge this into websockets (ws) removed socket.upgradeReq, so use req instead #1337 to see if it fixes the problem. (Update: it does!)

[storybookbot]

	Fails
🚫	PR is not labeled with one of: ["cleanup","breaking","feature","bug","documentation","maintenance","greenkeeper","other"]

Generated by 🚫 dangerJS

[codecov]

Codecov Report

Merging #1338 into master will increase coverage by 4.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1338      +/-   ##
==========================================
+ Coverage    9.43%   13.76%   +4.32%     
==========================================
  Files         204      202       -2     
  Lines        4630     4621       -9     
  Branches      518      588      +70     
==========================================
+ Hits          437      636     +199     
+ Misses       3716     3464     -252     
- Partials      477      521      +44

Impacted Files	Coverage Δ
addons/storyshots/src/require_context.js	0% <0%> (ø)	⬆️
addons/knobs/src/components/PropForm.js	8.51% <0%> (ø)	⬆️
addons/knobs/src/components/PropField.js	10.86% <0%> (ø)	⬆️
lib/ui/src/modules/api/configs/init_api.js	40.47% <0%> (ø)	⬆️
app/react/src/client/preview/init.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/routes.js	0% <0%> (ø)	⬆️
app/react/src/client/preview/reducer.js	0% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-build.js	0% <0%> (ø)	⬆️
...src/server/config/WatchMissingNodeModulesPlugin.js	0% <0%> (ø)	⬆️
lib/ui/src/context.js	0% <0%> (ø)	⬆️
... and 46 more

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[ndelangen]

🕶